Should Debates be allowed in another languages?

My strongest is my native language (Spanish) and I would feel more comfortable debating and making my point in that language. Since TED is a global iniciative, maybe we shouldn't limite the interchange or spreading of ideas to one language. Do you think others can feel that way or should we treat English as the main language for TED?

Feb 15 2011:
It is indeed not easy for everyone to join an English conversation. So, from that perspective it would be great to have conversations in your own language. I agree with that. But looking at it another way, it would also mean that many things that will be discussed will only be available for the relatively small group of people speaking the language in question. You could join the Spanish conversations and look at the English ones every now and then, and I could join a conversation in Dutch. But we would deny ourselves the opportunity to appreciate each other's conversations. I hope that in the not too distant future translating technology will make it possible to have a real conversation between people who do not share a language, but until then I think making the effort to speak a foreign language is worth it. Especially on a site like this.

Later this spring, Conversations users will have the ability to start or participate in conversations in any language, track them over time with email notifications, and see what conversations their friends are participating in.

Feb 17 2011:
Why not a multi threaded- multi lingual approach?
I'm pretty fluent in both Spanish and English, for example. I could seed a question or start a debate in both (imagine a tree with 2 branches). Those who can also write in both languages could answer in both branches, those fluent in only one of them could post on their branch, or start a new branch if they know another language. There could be an option to collaboratively translate popular or relevant answers so that they could appear trough all the language branches.

(Imagining this, I see it would be amazing to have a visual representation of a particularly intense debate trough different branches/languages. Ideas do spread like wildfires after all.)